Multiple processor system having software for selecting shared cache entries of an associated castout class for transfer to a DASD with one I/O operation
US5493668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1992 |
| Grant date | Feb 20, 1996 |
| Priority date | — |
| Expiry date | Mar 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/128
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A high-speed cache is shared by a plurality of independently-operating data systems in a multi-system data sharing complex. Each data system has access both to the high-speed cache and the lower-speed, secondary storage for obtaining and storing data. Management logic and the high-speed cache assures that a block of data obtained form the cache for entry into the secondary storage will be consistent with the version of the block of data in the shared cache with non-blocking serialization allowing access to a changed version in the cache while castout is being performed. Castout classes are provided to facilitate efficient movement from the shared cache to DASD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.